Calendar Black and Express Objects

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Hey All,

Does anyone have any experience extending the Calendar Block (from the marketplace, by Portland Labs) to include associating an express object with an event?

I'd like to be able to create and event, and associate multiple forms of content (stored in an express object) with that calendar event object.

The end goal is to use the Calendar Event List Block, to display a group of events based on date criteria, and then render the content stored in the associated express objects via a block template.

Everything seems in order, except associating the event and the express object.

Any thoughts?

I have added
<div class="form-group" data-container="express-entry-specific-entry">
                  <?php
                      $entity = Express::getObjectByHandle('location');
                      $form_selector = \Core::make('form/express/entry_selector');
                      print $form_selector->selectEntry($entity, 'exSpecificEntryID', $entry);
                  ?>
</div>

to /packages/calendar/elements/event/form.php and the form is working, but I'm not able to retrieve any attributes from $entry.

Any feedback is appreciated. Thanks!